[turbofan] Induction variable bound analysis.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 036bf6f528a8d1076cc6d9e7e1a738e6bb0b4b3e..37f6d2df6723e7b813bb8675370524ab194adf2d 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -45,6 +45,7 @@
 #include "src/compiler/load-elimination.h"
 #include "src/compiler/loop-analysis.h"
 #include "src/compiler/loop-peeling.h"
+#include "src/compiler/loop-variable-optimizer.h"
 #include "src/compiler/machine-operator-reducer.h"
 #include "src/compiler/memory-optimizer.h"
 #include "src/compiler/move-optimizer.h"
@@ -834,7 +835,10 @@ struct TyperPhase {
   void Run(PipelineData* data, Zone* temp_zone, Typer* typer) {
     NodeVector roots(temp_zone);
     data->jsgraph()->GetCachedNodes(&roots);
-    typer->Run(roots);
+    LoopVariableOptimizer induction_vars(data->jsgraph()->graph(),
+                                         data->common(), temp_zone);
+    if (FLAG_turbo_loop_variable) induction_vars.Run();
+    typer->Run(roots, &induction_vars);
   }
 };